Gas mixer



Feb. 1, 1938. l A, TYNKIN 2,106,903

GAS MIXER v Fil'd March 27, 1956 mmf/7,11,

1 INVENTOR.

BY l

/if fw ATTORNEY.

Patented Feb. 1, 1938 UNITED STATES GAS MIXER Application March 27,1936,'Serial No. '71,185

4 Claims.

This invention relates to gas mixers for internal combustion engines,and has special reference to improvements in one particularly adaptedfor use in feeding natural or similar gas to such an engine.

The principal object of the invention is to provide a more practical andefficient carburetor for this purpose than heretofore known.

Another object is to provide such a gas mixer having means automaticallyoperable by the gas mixer when in action and hydraulically controlled.

Other objects and advantages of the invention will appear in thefollowing description thereof.

Referring now to the accompanying drawing,

forming part of this application, and wherein like reference charactersindicate like parts.

Figure l is a vertical central sectional View of one of the improved gasmixers.

Figure 2 is a transverse sectional View on the line 2--2, Figure l, withportions thereof in elevation for better comprehension.

My improved gas mixer comprises the main body portion l having threeextensions 2, 3 and I therefrom, the extensions 2 and 4 being axiallydisposed and of smaller diameter than the body I while the extension 3is of substantially the same size as the body I; all being cylindricalin construction. A transverse rotatable shaft is indicated at 5 forcontrol of the supply throttle, ..0 and a parallel shaft indicated at 6passes through the extension il for control of the butterfly valve l,regulating the gas and air fuel supply to the engine, and common to suchgas mixers. These two shafts are connected in the usual manner by thelink 5 and levers 9 and I0 so as to function simultaneously.

The extension 3 embodies an automatic air supply to the gas mixer whichis governed hydraulically and will be described later.

The gas supply connection is shown at Il, and the gas is fed into theextension 2 of the gas mixer through the port I2 and this port iscontrolled by the vertically reciprocable valve head I3 carrying theresilient valve cap or seat I4, this valve head being normally held inclosed position by the two oppositely disposed expansive springs I5 andI6, the pressure of the spring I5 being controlled by the adjustableplug I1. The lower stem I8 of the valve head I3 extends Within thespring housing I9 which is mounted upon the eccentric 20 keyed to theshaft 5 so that rotation of the shaft 5 will raise and lower the valvehead during the throttling of the gas mixer.

While this construction of throttling the valve 5;-, may be old, one ofthe novel features of the instant invention resides n the air intakevmounted with in the extension 3, and which is provided with a removablesleeve 2 I-slid into thev extension 3 and which sleeve has a taperedy orconically shaped bore 22; the outlet of the bore in the *outer end of 5the sleeve being circular and controlled by the valve 23 which'isreciprocably carried upon the piston rod 2li attached to-'the Asleevepiston 25 within the cylinder 26. The tapered bore 22' of the sleeve 2inis for the purposeof `regula-ting the 10 volu-me of air as the valve 23is reciprocated; that is to say the farther the valve 23 is opened, theratio of the space for admission of the air is progressively increased,and, of course, the reverse occurs when the valve is being closed. 15

Within the cylinder 26 and upon both sides of the piston 25 is carriedsuitable oil for modifying the action of the piston when it is operated,and as the oil must be transferred from one end to the other of thecylinder when the piston is 20 reciprocated a passageway or by-pass 28is provided, it being obvious that the reciprocation inwardly of thepiston rod is accomplished by the vacuum of the engine, while it is heldnormally outwardly by the expansive spring 21 carried 25 about thepiston rod 24, within the innermost end of the cylinder 26. It will benoted that the head of the piston 25 is perforated and normally closedby a small spring controlled washer-like valve 29 which will be releasedon outward motion of 30 the piston but close on inward motion thereof,and, the cylinder 2S being full of oil, any movement inwardly of thepiston as caused by the suction of the engine not shown will necessitatetravel of the oil from the spring engaged side of 35 the piston throughthe port or passageway 28 to the opposite end of the piston, whereaswhen return action of the piston occurs the oil will readily passthrough the perforated head thereof. As a control means for the passageof oil from one end 40 of the cylinder to the other I have shown themanually operated needle valve 29, the adjustment of which will regulatethe flow of oil through the by-pass 28.

It will be noted, too, that the cylinder 26 is an 45 extension of thecup-like pervious member 30 which is screw-threadedly mounted upon theouter extremity of the extension 3 and forms holding means for thesleeve 2I, having the frustro-conically shaped bore 22 therein. 50

From the above it is evident that I have provided an ecient andpractical form of gas mixer designed for use in connection with naturalor other similar gas and having an automatically adjustablehydraulically controlled air supply therefor, which forms a principalnovel feature of the invention.

Having thus described my invention, what I claim and desire to secure byLetters Patent, is:

1. The combination with a fuel gas and air mixer having a main mixingchamber provided with gas inlet and discharge ports, an air inletchamber communicating with said main mixing chamber intermediate of saidgas inlet and discharge ports, a valve for control of said air inletincluding a piston carrying rod, a cylinder within which said pistonreciprocates, an expansive spring within said cylinder intermediate ofthe piston and head of the cylinder towards said valve to normally keepvthe latter closed, said cylinder being adapted to contain a body of oilpositioned upon both Sides of said piston, an oil by-pass from one endof the cylinder to the other and a manually adjustable valve within saidbypass to regulate the flow of oil from one end of said cylinder to theother and thus control the action of said valve.

2. The combination with a gas mixer of the character described having amain mixing chamber provided with gas inlet and discharge ports, an airlinlet chamber communicating with said main mixing chamber intermediateof said gas inlet and discharge ports, a valve to control the amount ofair passing through said air inlet including a piston carrying rod, acylinder within which the piston reciprocates, said cylinder beingadapted to contain a body of oil to retard the action of said piston,and spring means to hold the valve normally closed.

3. 'I'he combination with a gas mixer of the character described havinga main mixing chamber provided with gas inlet and discharge portscommunicating therewith, an air inlet chamber intermediate of said gasinlet and discharge ports, a Valve to control the amount of air passingthrough said air inlet, a cylinder adapted to contain a body of oil, apiston Within the cylinder, a rod connecting the valve and piston, meansfor holding the valve normally closed, said piston being retarded by theaction of the oil in said cylinder, and means-to vary the retardinginfiuence of said oil;

4. The combination with a fuel gas and air mixer having a main mixingchamber provided with gas inlet and discharge ports, an air inletchamber communicating with said main mixing chamber, a valve for controlof said air inlet including a piston carrying rod, a cylinder adapted tocontain a body of oil and Within which said piston reciprocates, aspring about the rod to normally keep the valve closed, and a manuallyadjustable oil by-pass to regulate the flow of oil therein from one endof the cylinder to the other and thereby control the action of thevalve.

ALBERT TONKIN.

